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/*Copyright (c) 2011, Florent DEVILLE.                                      */
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#pragma once
#include "RTILight.h"

namespace RT
{
	/*Spot light*/
	class RTSpotLight : public RTILight
	{
	private:
		/*light cut off angle*/
		F32 m_cutOffAngle;

		/*light beam angle*/
		F32 m_beamAngle;

		/*light's direction*/
		RTVector3f m_direction;

		/*light's position*/
		RTVector3f m_location;

		/*light's attenuation*/
		RTVector3f m_attenuation;

	public:
		/*Default constructor*/
		RTSpotLight();

		/*Constructor*/
		RTSpotLight(const RTColor& color, const RTVector3f& location, const RTVector3f& direction, F32 cutOff,
			F32 beam, const RTVector3f& attenuation);

		/*Destructor*/
		~RTSpotLight();

		/*Compute light color*/
		RTColor computeColor(const RTRay& ray, F32 dist)const;

		/*Compute the light's shadow ray*/
		void computeShadowRay(const RTVector3f& point, RTRay& shadowRay, F32* distance)const;

		/*Apply the view matrix to the light*/
		void applyViewMatrix(const RTMatrix44& view);
	};
}